<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
    <style type="text/css">
        div{
            margin: auto;
            width: 500px;
            height: 1000px;
        }
        form{
            width: 300px;
            margin-left: 100px;
            margin-top: 200px;
        }
        .submit{
            margin-top: 10px;
            margin-left: 100px;
        }
    </style>
</head>
<body>
    <div>
        <form action="login" method="post">
            账号:<input type="text" name="username"><br>
            密码:<input type="password" name="password"><br>
            <input class="submit" type="submit" value="登录">
        </form>
    </div>
</body>
</html>